LEVEL 1 MLA & MLT REVIEW EXAM NEWEST
VERSION 2025-2026 WITH 120+ QUESTIONS AND
ACCURATE DEATAILED ANSWERS GRADED A+
The primary reason that machinery is replaced is due to:
a) Erosion
b) Accidents
c) Obsolescence
d) Surface degradation of the metal
e) Corrosion
-Answer- d
Wear is the primary cause of machinery replacement Surface
degradation of the metal includes all types of wear such as
abrasion, adhesion, erosion, corrosion, etc.
Which of the following is not a lubrication regime (mode /
type)?
a) Boundary
b) Elastohydrodynamic
c) Boundarydynamic
d) Hydrodynamic
e) Mixed film
-Answer- c
Which maintenance strategy is based strictly on tasks performed
at specific time intervals?
a) Proactive
b) Predictive
,c) Preventive
d) Percussive
e) Reactive -Answer- c
Preventive maintenance is time-based. Generally, this type of
maintenance is not cost-effective because parts are changed
prematurely and failures occur due to late or improper
maintenance.
Condition-based maintenance:
a) is based on the condition of the equipment and the early
detection of faults
b) is based on regular time-based overhauls
c) Is based on run to failure
d) is based on the condition of the oil and other root causes
-Answers a and d
Condition-based maintenance is often referred to as predictive
maintenance (PdM) where the ultimate goal is to perform
maintenance activity based on early detection of problems using
periodic or continuous monitoring, Obviously, (e) is the correct
answer, while (b) and (c) represent preventive and reactive
maintenance, respectively,
The Pareto Principle (80/20 Rule) states:
a) The largest beneficial effect is obtained from a critical few
maintenance tasks
b) The largest beneficial effect is obtained from the (random)
many maintenance tasks
c) All machines die sometime
d) All bearings live forever
,e) 80 percent of the people do 20 percent of the work
-Answer- a
In general, the Pareto Principle states that, for many events,
roughly 80 percent of the effects come from 20 percent of the
causes, so the correct answer is (a).
Which of the following is not a function of the lubricant?
a) Cool surfaces
b) Separate surfaces
c) Prevent corrosion
d) Repair surfaces
e) Provide some scaling -Answer- d
The functions of a lubricant include controlling friction and
wear by separating surfaces in addition to cooling, corrosion
prevention, sealing and transmitting power in some applications
such as hydraulic systems. The correct answer is (d), as surface
repair cannot be achieved using lubricants.
Which type or form of lubrication is considered to provide a full
fluid (oil) film?
a) Elastohydrodynamic
b) Solid Film
c) Boundary
d) Mixed -Answer-a
Elastohydrodynamic lubrication is a form of hydrodynamic
lubrication (full film separation). It is called elastohydrodynamic
because the lubricated components deform clastically due to
high pressure.
, Elastohydrodynamic lubrication (EHL) is considered to occur
primarily in:
a) Piston rings and liners
b) Journal bearings
c) Rolling bearings, gears and cams
d) Slow-moving pins and bushings
c) Worm gears
-Answer-c
EHL occurs in systems where the contact area is small and the
pressure is high, such as rolling clement bearings. gears (at the
pitch line) and cams. The mating surfaces deform elastically to
enlarge the contact area, which is why it is called
clastohydrodynamic lubrication.
The oil film thickness (or dynamic operating clearance) in
operating bearings:
a) Cannot be determined
b) Is about 10 microns for journal bearings (although can vary
considerably)
c) Is about a micron for rolling bearings
d) Is not measurable
e) Answers b&c -Answer-Answer: "e"
Generally, the film thickness in a journal bearing is
approximately 10 microns, while in a rolling element bearing it
is about 1 micron. This is why rolling element bearings are more
sensitive to contaminants.
VERSION 2025-2026 WITH 120+ QUESTIONS AND
ACCURATE DEATAILED ANSWERS GRADED A+
The primary reason that machinery is replaced is due to:
a) Erosion
b) Accidents
c) Obsolescence
d) Surface degradation of the metal
e) Corrosion
-Answer- d
Wear is the primary cause of machinery replacement Surface
degradation of the metal includes all types of wear such as
abrasion, adhesion, erosion, corrosion, etc.
Which of the following is not a lubrication regime (mode /
type)?
a) Boundary
b) Elastohydrodynamic
c) Boundarydynamic
d) Hydrodynamic
e) Mixed film
-Answer- c
Which maintenance strategy is based strictly on tasks performed
at specific time intervals?
a) Proactive
b) Predictive
,c) Preventive
d) Percussive
e) Reactive -Answer- c
Preventive maintenance is time-based. Generally, this type of
maintenance is not cost-effective because parts are changed
prematurely and failures occur due to late or improper
maintenance.
Condition-based maintenance:
a) is based on the condition of the equipment and the early
detection of faults
b) is based on regular time-based overhauls
c) Is based on run to failure
d) is based on the condition of the oil and other root causes
-Answers a and d
Condition-based maintenance is often referred to as predictive
maintenance (PdM) where the ultimate goal is to perform
maintenance activity based on early detection of problems using
periodic or continuous monitoring, Obviously, (e) is the correct
answer, while (b) and (c) represent preventive and reactive
maintenance, respectively,
The Pareto Principle (80/20 Rule) states:
a) The largest beneficial effect is obtained from a critical few
maintenance tasks
b) The largest beneficial effect is obtained from the (random)
many maintenance tasks
c) All machines die sometime
d) All bearings live forever
,e) 80 percent of the people do 20 percent of the work
-Answer- a
In general, the Pareto Principle states that, for many events,
roughly 80 percent of the effects come from 20 percent of the
causes, so the correct answer is (a).
Which of the following is not a function of the lubricant?
a) Cool surfaces
b) Separate surfaces
c) Prevent corrosion
d) Repair surfaces
e) Provide some scaling -Answer- d
The functions of a lubricant include controlling friction and
wear by separating surfaces in addition to cooling, corrosion
prevention, sealing and transmitting power in some applications
such as hydraulic systems. The correct answer is (d), as surface
repair cannot be achieved using lubricants.
Which type or form of lubrication is considered to provide a full
fluid (oil) film?
a) Elastohydrodynamic
b) Solid Film
c) Boundary
d) Mixed -Answer-a
Elastohydrodynamic lubrication is a form of hydrodynamic
lubrication (full film separation). It is called elastohydrodynamic
because the lubricated components deform clastically due to
high pressure.
, Elastohydrodynamic lubrication (EHL) is considered to occur
primarily in:
a) Piston rings and liners
b) Journal bearings
c) Rolling bearings, gears and cams
d) Slow-moving pins and bushings
c) Worm gears
-Answer-c
EHL occurs in systems where the contact area is small and the
pressure is high, such as rolling clement bearings. gears (at the
pitch line) and cams. The mating surfaces deform elastically to
enlarge the contact area, which is why it is called
clastohydrodynamic lubrication.
The oil film thickness (or dynamic operating clearance) in
operating bearings:
a) Cannot be determined
b) Is about 10 microns for journal bearings (although can vary
considerably)
c) Is about a micron for rolling bearings
d) Is not measurable
e) Answers b&c -Answer-Answer: "e"
Generally, the film thickness in a journal bearing is
approximately 10 microns, while in a rolling element bearing it
is about 1 micron. This is why rolling element bearings are more
sensitive to contaminants.
